1. Magnetism Any time electrical power is moving through a wire magnetism is created Any time magnetism moves past a wire electrical power is created

2. Magnetism Define the following terms: Flux lines Lines of magnetic force Flux density How close the flux lines are to each other Polarity North and South Pole

3. Magnetism How can you increase the strength of an electromagnetic field? Increase the Power (amps and volts) Loop or Coil the conductor Focus the lines of flux with an iron core

5. Magnetism How does a Relay work? Using magnetic force… …A small electrical load… …can control a large electrical load

8. Switch is ON …. Motor does not run 12.6 V 0 V 0.0 V BAD SWITCH 0 V

9. Switch is ON …. Motor does not run 12.6 V 0.0 V BAD GROUND 12.6 V

10. 0 V BAD MOTOR GOOD RELAY 12.6V 0 V

11. Practice Diagnosing A Relay http://cf.linnbenton.edu/eit/auto/krolicp/web.cfm?pgID=3598http://cf.linnbenton.edu/eit/auto/krolicp/web.cfm?pgID=3598